Electronic Resource
Springer
Journal of low temperature physics
105 (1996), S. 1415-1420
ISSN:
1573-7357
Keywords:
74.62Dh
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Cu-site substituted thin films of YBa2(Cu1-zMz)3O7-δ (M=Zn,Ni) are reinvestigated. The Tc-suppression and residual resistivities ϱo are measured as a function of the concentration z. We found that for low concentrations z 〈 4% the substituents occupy preferrably the in-plane Cu sites whereas for higher concentrations the chain sites are also occupied. Although the residual resistivities of Ni and Zn differ only slightly, the Tc-suppression of Zn is 2.3 times larger than that of Ni. To reconcile the measured resistivities with predictions of a two dimensional scattering model, it is necessary to assume a scattering potential of finite range and to take scattering phase shifts] δl of higher angular momentum (l 〉 0) into account. The different Tc-suppression rates for Zn and Ni are also discussed within this picture.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00753898
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